package com.ladlee.validata.image;

import com.ladlee.properties.SecurityProperties;
import com.ladlee.validata.ValidateCodeGenerator;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;

/**
 * @Auther: dingchang
 * @Date: 2018/12/21 14:52
 * @Description: 图形验证码生成
 */
@Data
public class ImageCodeGenerator implements ValidateCodeGenerator {

    @Autowired
    private SecurityProperties securityProperties;

    @Override
    public ImageCode generate() {
        //验证码宽度
        int width = securityProperties.getCode().getImage().getWidth();
        //验证码高度度
        int height = securityProperties.getCode().getImage().getHeight();
        //验证码长度
        int lengh = securityProperties.getCode().getImage().getLength();
        //验证码过期时间
        int expireIn = securityProperties.getCode().getImage().getExpireIn();

        BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);//构建图形类型
        Graphics g = image.getGraphics();//绘图2D物理图形
        Random random = new Random();//随机类

        g.setColor(getRandColor(200, 250));
        g.fillRect(0, 0, width, height);//设置宽高
        g.setFont(new Font("Times New Roman", Font.ITALIC, 20));//字体
        g.setColor(getRandColor(160, 200));//颜色

        for (int i = 0; i < 155; i++) {
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x, y, x + xl, y + yl);
        }
        String sRand = "";
        for (int i = 0; i < lengh; i++) {
            String rand = String.valueOf(random.nextInt(10));
            sRand += rand;
            g.setColor(new Color(20 + random.nextInt(110), 20 + random.nextInt(110), 20 + random.nextInt(110)));
            g.drawString(rand, 13 * i + 6, 16);
        }

        g.dispose();

        return new ImageCode(sRand, expireIn, image);
    }

    /**
     * 生成随机背景条纹
     *
     * @param fc
     * @param bc
     * @return
     */
    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if (fc > 255) {
            fc = 255;
        }
        if (bc > 255) {
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r, g, b);
    }
}
